參數(shù)資料
型號: L6714
廠商: STMICROELECTRONICS
元件分類: 穩(wěn)壓器
英文描述: SWITCHING CONTROLLER, 170 kHz SWITCHING FREQ-MAX, PQFP64
封裝: 10 X 10 MM, LEAD FREE, TQFP-64
文件頁數(shù): 30/70頁
文件大小: 694K
代理商: L6714
Voltage positioning
L6714
36/70
12
Voltage positioning
Output voltage positioning is performed by selecting the reference DAC and by
programming the Droop Function and Offset to the reference (See Figure 11). The currents
sourced from DROOP and FB pins cause the output voltage to vary according to the
external RFB resistor.
In addition, the embedded Remote Buffer allows to precisely programming the output
voltage offsets and variations by recovering the voltage drops across distribution lines.
The output voltage is then driven by the following relationship:
where
DROOP function can be disabled as well as the OFFSET: connecting DROOP pin and FB
pin together implements the load regulation dependence while, if this effect is not desired,
by shorting DROOP pin to SGND it is possible for the device to operate as a classic Voltage
Mode Buck converter. The DROOP pin can also be connected to SGND through a resistor
obtaining a voltage proportional to the delivered current usable for monitoring purposes.
OFFSET can be disabled by shorting the relative pin to SGND.
V
OUT
V
REF
R
FB
I
DROOP
I
OFFSET
()
=
V
REF
VID
19mV
VR10 - VR11
VID
AMD 6BIT
=
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